dimensions, tolerances and assemblies
dimensioning
types of dimensioning
Tolerance
impacts assembly construction
types and importance of dimesioning
Dimension Line
Dimension Text
base dimension
Usually uses the units in mm
dimensioning of radius
parallel dimensioning
superimposed running dimensioning
dimensioning of small features
dimensioning of multiple features
combined dimensioing
chain dimensioning
dimensioning angles
circle, arc and hole
curved dimension line and has a degree symbol
N x Dimension [to make multiple same dimensions]
arc - by its radius
holes - located by centerlines
circle - dimensioned by diameter
only used when the growth of tolerances does not impact the product's function
reduces parallel dimensioning which leads to saving space on drawing
uses both chain and parallel dimensioning
arrow heads outside the extension line for clear reading
Shares the same reference surface that consists of various dimensions
allows connecting part to connect properly
improves quality control
without tolerance, must have exact measurements of product
the range differs as production degree differs
types of tolerance
Limit
Bilateral
Unilateral
goes one way
has an upper and lower range
formula
upper limit - lower limit
goes both way - equal
Assembly Modelling
2 types of fitting
clearance fit
interference fit
an allowance available for two parts to move
hard to take out or put in back
combines parts to depict a product